Zepbound and Mounjaro are both tirzepatide — the same GLP-1/GIP dual agonist molecule manufactured by Eli Lilly.
Same molecule, different FDA label
- Mounjaro: type 2 diabetes (approved 2022).
- Zepbound: chronic weight management (approved 2023).
- Same dose schedule: 2.5 mg → 5 mg → 7.5 mg → 10 mg → 12.5 mg → 15 mg weekly.
Why the split matters
Some insurance plans cover one and not the other. The molecule is identical — read our full comparison for prescribing nuance.
Related resources
More in Drug information
What is the difference between Ozempic and Wegovy?
Both contain semaglutide (Novo Nordisk). Ozempic is FDA-approved for type 2 diabetes; Wegovy is approved for chronic weight management at a higher max dose.
How do GLP-1 medications cause weight loss?
GLP-1 receptor agonists slow gastric emptying, increase satiety, and reduce hunger signals — most patients lose 12–22% of body weight over 12–18 months.
What is compounded GLP-1 and how is it different?
Compounded GLP-1 is custom-mixed by a 503A or 503B pharmacy. It costs less but is NOT FDA-reviewed for safety or efficacy.